Companion plants for Garden Phlox
Garden Phlox blooms from July through September. It wants full sun and moderate water. The 8 companion pairings below each state why the pairing works.
Blooming before Garden Phlox opens

Sea Thrift
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; lower at 8 in, for the front of the border; both offer pollinator forage, in different months.

English Daisy
Shares full sun and moderate water; blooms in mid spring, before this one opens; low at 6 in, to carpet the ground beneath; both offer pollinator forage, in different months.

Chives
Shares full sun and moderate water; blooms in late spring, before this one opens; both are strong pollinator plants, and they feed in different months; lower at 12 in, for the front of the border.

Rock Cress
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; low at 4 in, to carpet the ground beneath; both offer pollinator forage, in different months.

Pansy
Takes full sun to part sun and moderate water; blooms in early spring, before this one opens; lower at 8 in, for the front of the border; both offer pollinator forage, in different months.

Ninebark
Shares full sun and moderate water; blooms in late spring, before this one opens; both are strong pollinator plants, and they feed in different months; both are North American natives.

Hyacinth
Shares full sun and moderate water; blooms in early spring, before this one opens; lower at 10 in, for the front of the border; both offer pollinator forage, in different months.
Blooming alongside

Thyme
Shares full sun and low to moderate water; opens in late spring and overlaps into this one's season; low at 6 in, to carpet the ground beneath; both are strong pollinator plants.